Keri Systems EntraGuard Silver Quick Start - Manual (Page 19)

EntraGuard
®
Silver Telephone Entry Control
Quick Start Guide
Page 19 of 27 P/N: 01960-001 Rev. D
5.2.3 Modem to PC Serial Connection
Keri Systems does not provide this cable. It is an off-the-shelf item from any computer supplier or electronics store, and
its configuration is dependent upon the configuration of the serial port on the host computer. Based on the serial port, there
are four possible cables.
• If the modem has a male DB-25 connector and the host computer’s serial port has a female DB-9 connector, purchase
or create a cable as shown in Figure 21.
• If the modem has a male DB-25 connector and the host computer’s serial port has a female DB-25 connector,
purchase or create a cable as shown in Figure 22.
• If the modem has a male DB-9 connector and the host computer’s serial port has a female DB-9 connector, purchase
or create a cable as shown in Figure 23 on page 20.
• If the modem has a male DB-9 connector and the host computer’s serial port has a female DB-25 connector, purchase
or create a cable as shown in Figure 24 on page 20.
NOTE: Keri Systems requires using modems from the same manufacturer at both the host computer and the access control
network. This eliminates the possibility of incompatibilities between modems from two different manufacturers from
affecting the communication between access control network and host computer. Keri Systems cannot be held responsible
for problems caused by incompatibilities between modems from two different manufacturers.
Figure 21: Modem/DB-25M to PC/DB-9F PC Serial COM Port Connection
Figure 22: Modem/DB-25M to PC/DB-25F PC Serial COM Port Connection